METHOD OF AERATION MIXTURE'S INTERNAL RECIRCULATION CARRYING OUT DURING WASTE WATERS' BIOLOGICAL TREATMENT AND EQUIPMENT FOR THIS METHOD REALIZATION

摘要

The solution concerns a method of performing internal recirculation of active mixture in biological treatment of waste waters mainly by process of nitrification and denitrification, during which the variant part is separated from the current of intensively flowing activation mixture with flowing speed at the surface of 0.25 to 5.0 m.s<-1> and this variant part is lead to the required process zone, during which it has to overcome a hydrostatic height of up to 0.18 m. The device for performing this process consists of a rotation surface aerator, at the distance of 10 to 200 percent of the diameter of which in the flowing direction there is a pipeline or a chute, whose one end is in the surface level rotationally and/or hingedly or firmly attached in a section wall between the reaction zones. The inlet part is equipped with a device for changing the position and/or profile of the inlet part with regards to its width or the direction of the intensely flowing liquid.